The first once with this Isonic 122 on the water with more than 12 knots and a 8,0 sails one. I have the Lessacher duet Weed with 30 degrees Rake driven to the first one once, too. With this combination it ran very well. I could run very Hight in the wind and go to the flat one far well. At the start I had weed at the fin some Time. This was because the water was not so deep and the fin goes at the start into the ground. In this conditions' very flat water and weed this fin has a better performance then pure weed fins or a just a normal fin.